Not strictly speaking as long as the dipole is truly balanced. Certainly for vhf and uhf anyway. Impedance matching is a must if you start wanting to make dipoles for the HF bands though.

As previous comment

Have a look at the Baofeng owners facebook page. Someone recently put something on there I believe.

I believe there is a reset option in the menu.

Unfortunately not, or at least the last time I checked you couldn’t do it via the app.

Is that your scientific, tested analysis or just comment Tourette’s kicking in?

Good to know👍🏼

Omg that’s so 2024!

Or you could stick a ferret in there if you really wanted to have some fun!!! 😉

Mush admit that’s very unusual intern of quality control and also their customer support. Have you tried a factory reset on all of them?

Thank you for your reply. Trust me I’ve been an amateur radio amateur radio operator advanced technician license for over 35 years I’ve bought and sold hundreds baofengs /wouxun/ICOM‘s etc.. out of about 150 baofengs I had two that were DOA i got a hold of my supplier instantly replaced them with the next order. No questions never had such a hard time getting warranty on something let alone the failure rate they have even on this thread of yours. There’s quite a few failure rates people are talking about. I’m on multiple other forums, exact same thing if they didn’t work out of the box, they broke down months later and the headaches some people had to go through to get replacement So I have done all the resets all the reprogramming, etc. I have the proper test gear for testing these radios. I have however now been directed to a newer guy through their site that is looking after this case so far I’ve been overly patient Thank you again for your reply.

Im sorry to hear you’ve had such a bad experience. If you want to email me your name, Callsign, invoice details and any communications you’ve you’ve had with them I’ll do my best to find out what’s happened. [email protected]

@@M7EUP thank you I’m sending off a bunch more pictures today to a new person at tidRadio if that doesn’t go anywhere shortly I will definitely take you up on your offer

I did send you a email

I think I proved it would?

Well that’s a start

That’s a difficult one to answer easily. Firstly you need to get yourself outside and up in the hills. You will hear some amateur radio stuff between 144-146MHz and 430-440MHz You can also hear airband if the radio is capable (depends what version you got) and there’s a video on my channel to help with that.

I explain all the measurements in the video. It’s impossible to add a photo/diagram without re uploading the video.

Excellent. Enjoy the build

Good idea 👍🏼

You’re very welcome.

Ha! Nice Callsign. Hope to get you in the log soon. Thanks for the sub

Legally speaking you need the appropriate “license” for whatever purpose you want to use these radios in your country. Whether that’s HAM, GMRS ETC You should also check the radios meet the correct criteria as set out within those licenses.

Clearly you didn’t actually watch the previous video in the series where I explain the principles of line of sight and signal degradation over ground and distance. Furthermore: AM signals do degrade over distance due to several factors: Attenuation: As the RF travels further from the transmitter, their energy spreads out over a larger area. This causes the signal strength to decrease, making it weaker at the receiver. Absorption: The Earth's atmosphere and other objects in the environment can absorb some of the energy from the RF, further weakening the signal. Interference: Other radio signals, electrical devices, and even natural phenomena like lightning can interfere with AM signals, causing distortion and making them harder to receive clearly. Fading: The strength of AM signals can fluctuate due to changes in the atmosphere, such as variations in temperature and humidity. This can cause the signal to fade in and out. Is distance a factor? Yes! Are distance and elevation the same thing? Yes. What was your point?

I honestly don’t have it to hand but I got it from cpc.farnell and if you search “IP65 enclosure clear” you’ll done one of the right dimensions.

@@M7EUP Is it the 190 x 140mm enclosure?

“Possibly overkill” 😂

Thanks for the comment. Here is a mathematical answer: The minimum gap is zero and the maximum gap is λ/2. The mathematically ideal gap is 0, as explained in several books on antenna theory; there is an integral over the dipole length as charge is collected. Any gap between 0 and λ/2 will work, but it will work a little "better" if the gap is closer to --or equal to-- 0. However a gap of zero is a short circuit and won’t work, too smaller gap under a reasonable amount of RF will spark and short. The real answer is: Buggering about and seeing what works best. Ultimately I found that the lengths and spacing work for me and it’s a starting point for anyone wanting to recreate the build.

@@M7EUP Excellent, thanks for that thorough description and the "real answer", haha. Did you end up having to tune this one by moving them in/out?

@ a little just to find the best SWR but anything below 2:1 if fine.

Thanks for the comment, most modern power strips contain MOV’s ( Metal oxide varistors ) to some extent to regulate power surges. However, in HAM radio application the transceiver is not usually directly connected to the mains power supply. It is fed 13.8V DC with a power supply unit, thus adding another level of protection.

No worries mate. Hope he won 🏆

Catch you on the next one.

Thank you 🙏 73

It can’t be. Wherever you purchased it from have locked it down to the HAM bands.

Τι εννοεις να το ξεκλειδωσεις; Ποια λειτουργια θες να ξεκλειδωσεις;

@@Italos1985 Να εκπέμπει και να λαμβάνει με ανοιχτό εύρος 136-174MHz & 400-470MHz και στη συχνότητα 220MHz. Τώρα εκπέμπει και λαμβάνει μόνο στο εύρος των αποκλειστικά ραδιοερασιτεχνικών συχνοτήτων.

That would entirely depend on the type of interference you want to eliminate and its frequency. What sort of issue are you trying to fix?

bzzzzzzz bzzzzzz

Thanks for the comment but I’ve had dozens of people pointing that out already. 👍🏼😂

In not sure what this means 😂

The link should be in the description mate 👍🏼

No. As an FAA pilot you should know that the production of transmit capable radios is highly regulated and scrutinised. Regulations: (UK) • The radio equipment should be approved by the Civil Aviation Authority or EASA; • The radio installation is approved by the Civil Aviation Authority Approved Maintenance Organisation; • The installation and use of the radio equipment is covered by a Wireless Telegraphy Act Radio Licence issued by the CAA on behalf of the Office of Communications; • The user of the equipment holds a Flight Radiotelephony Operators Licence issued by the Civil Aviation Authority. Hardware: The Baofeng radios are $30. For this you get a basic FM radio. The AM airband receiver (if available) is a very basic demodulator and is not a modulator for AM transmission. Even if it was Transmit capable it does not have any filtering, nor does it have any level of spectral purity. In a nutshell it is A: Impossible and B: highly illegal if it were possible. I find it highly unlikely that ANY responsible person would want to transmit on AIRBAND with a $30 radio for any professional reason. [edit] However, and after sleeping on this and realising that my initial reply was a bit of a rant (I apologise) and in the spirit of amateur radio which encourages learning and experimentation, I would add the following… It may well be possible to force the radio to transmit an AM signal by modifying the software but there are two main issues. The first is that Baofeng flash the firmware to the radio at the factory and have historically never issued any updates. Unlike Quansheng and TidRadio no one has been able to develop custom software for Baofeng due to this. People have tried but not really succeeded in modifying the software due to the complexities of how it is initially installed. Secondly, assuming that we in fact could modify the firmware to Tx AM airband the limitations of the hardware itself would not lend itself to any sort of quality output.

Never mind. The band conditions were awful anyway, another time.

In my personal opinion yes.

Thanks bud i have just ordered one i haven't a clue how to use them like but it's a start lol am trying to find a new hobby and this one seems interesting so just want to give it a go and find the right Radio to do it.

@ it’s a solid little radio to get you started. See if you have a local amateur radio club and drop down to their meetings. You’ll learn so much and they’ll help you get the first stage of licensing. Once you have the bug you’ll move onto other radio bands for world wide contacts.

Thanks mate ill take your advice and see how I get on I'll be sure to subscribe to your channel aswell 👍

It’s a good question but you are more likely to cause more issues with a metal case in terms of the RF coupling to the case itself.

@@M7EUP That seems counterintuitive, but I'm more DC (audio) than RF, so I'm not entirely surprised that weird stuff(TM) might happen... On the other hand, though, RF stuff is often in cans for exactly this reason... 🤔

Just get a k-type programming cable from Amazon The Retevis ones work every time. Don’t get unbranded one as they might not work. amzn.eu/d/eINh2OE

@@M7EUP Thank you ! :)

👍🏼

Some people just need to have their say, welcome to KZbin. All the individual items are listed with links in the description. If you go to the link for the oval cores you’ll be taken to the mouser website. Click on the Data Sheet link from there for the full specification.

@M7EUP excellent and thanks so much

It’s a sturdy radio with much better filtering than the “Fengs” and the front end is certainly much more robust and not as deaf to strong signals. However, ultimately it’s a handheld and not an expensive base station with complex band pass technology. So I would still avoid pairing it with ridiculous high gain antennas.

Yes. About 9 or 10mm

⁠@@M7EUP Making sure I’m asking right. The “u” or bend between the 70cm and 2m length. That “u” needs to be about 9-10mm?

Yes, if you bend the wire around a 10mm rod like I do in the video until the wires are parallel and the gap between them is 10mm all the way along.

Awww thank you.

Both.

That’s a great question. If you can visualise any interference travelling up one wire and back down the other in opposite directions like ripples heading towards each other in a pond, when they meet they stand a chance of cancelling each other out. Twisting the wires increases that chance. That said, anecdotally people have built these without twisting the wires and seen little difference in performance. However I would always give myself the best chance of reducing any RF so I add the twists.

“Common mode rejection”

It’s a great radio. I had one too

Many thanks.

It’s all about experimentation and what works for the individual as you know.

I was very lucky with that purchase I must admit.

That’s a valid point but makes not discernible difference on the extension I purchased. Good comment though.

Really? Well I hope it made a subscriber of you 😃